Air-circulating system



May 29, i923..

R. KRAMER AIR CIRCULATING SYSTEM Filed Sent. 2 1921 2 Sheets-Shee; l

NI/INTOR. ELP.: :JLPH KRAMER vfay 29, EQZL f R. KRAMER AIR CIRCULATINGSYSTEM lFiled Sepia. 2. 1921 2 Sheets-Sheet 2 INVENTOR.

ELU: @LPr-i KRAMER @Y Hfs [TQEA/*fr Patented llt/lay 2.9, 1923.

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RUJDULPH KRAMER, 0F SHEYENNE, NORTH DAKOTA.

AIR-CIRCULATXNG SYSTEM.

Application filed @eptember 2, 1921.

To all whom t may concern.'

Be it known that l, RUnoLrH KRAMER, a citizen of the United States. andresident of Sheyenne. in the county of Eddy and State of North Dakota,have invented certain new and useful Improvements in Air-CirculatingSystems, of which the following is a specification.

This invention relates to air circulating devices, having referenceparticularly to an improved mechanism for circulating air adjacent to anautomobile motor.

ln circulating devices of this character it has been customary to drawoutside air` through a water-circulating radiator, for the purpose ofcooling the motor, by employing a suction fan which is operated by themotor; and in very cold weather the water in the radiator frequentlyfreezes, thus injuring the structure.

My invention has for its principal object the provision of means forexhausting warm air from around the motor and passing it through theradiator to obviate such, liability of freezing. by providing a fan ofnovel construction which is adaptable for alternate use as a means forcirculating cool air around the motor and drawing warm air from its hoodor casing and expelling it through the radiator.

ln carrying out my invention, l provide a convertible fan which may beemployed either for drawing outside air through the radiator andcirculating it around the motor or for drawina warm air from the mot-orhood and expel-ling it through the radiator, constituting a convertiblefan, means for reversing the pitch of the fan blades, whereby they maybe alternately employed for drawing and expelling air, and means foroperating the device from the automobile at a point adjacent to thedrivcrs seat, all as hereinafter fully described and specifically setfort-h in the appended claims.

In the accompanying drawings forming part of this specification, Figure1 is a plan viewl illustrating an embodiment ofmy improvements Fig. 2 isa longitudinal sectional view taken on the line 22 of Fig. 1;

Fig. 3 is a sectional plan view taken on the line 3--3 of Fig. 2; and

- Fig. 4 is a fragmentary view of the forward part of an automobilehaving my improvements attached thereto.

ln the drawings, 2 indicates a part of the Serial No. 498,115.

automobile chassis, 3 the motor hood, 4lthe forward part of the body, 5the radiator, and 6 the motor.

@n thc forward end of the motor casing is mounted a bracket 7, having ahorizontal spindle 8, extended forwardly therefrom, upon which the fan 9rotates.

The fan comprises a hub 10 mounted on Iball bea-rings 11, and having anextended sleeve 12 carrying a fixed pulley 13 which 1s mounted on ballbearings 1a. Slidably engaging the sleeve 12, by means of a key 15, is acylindrical collar comprising an outer member 16 and a telescopicallyconnected member 17, which is secured against slidable movement on the.sleeve 12 by means of a screw 18. which extends through a slot 181 andis threaded into the sleeve member 12 of the fan hub 10.

vRadially extended from the member 17 is a pin 19, which extends througha helical cam-slot 20 of the collar 16, whereby rearwardly slidablemovement of said collar rotates the member 17. rllhe collar 16 isprovided with an annular channel 1t)a for the accommodation of a forkedrod 21, which oscillatcs on an arm 7a of the bracket 7 by means of apivot 22. Pivotally connected to the forked rod 21 is an elongated drawbar 23 which passes through an aperture 7" of the arm 7a and extendsinto the car, a handle or knob 23a being provided for operating the rot.

Formed integral with the member 17 is an annular flange 24, havingperipheral recesses 25 which engage rearwardly projecting pins 26.extended respectively from the shanks 27 of the propeller blades 28.These pins 26 swing in tapered slots 29 of the hub 10, whereby the'swingof the blade is limited. as shown in Figures 1 and 3' of the drawings.

ln the operation of my invention, the pulley 13 is connected with apulley 30, mounted on the motor shaft 31, by means of a belt 32: andwhen it is desired to draw outside air through the radiator the fanblades are set in position shown in Fig. l of the drawing, the pitch ofthe blades then being set to draw air inwardly. rlhen when it is desiredto draw warm air from the hood and expel it through the radiator theforked rod 21 is oscillated rearwardly by means of the draw .bar 23,whereby the collar 16 is moved rearwardly into position, shown in Fig. 3of the drawings, and the member 17 is rotated suflciently to swing thefan blades in the reliti@ BMD verse position shown in said Fig. 3, forthe purpose of drawing warm air from the hood 3 and expelling 1t throughthe radiator, whereby the same may be warmed sufficiently to preventfreezing of the water contamed therein.

l do not wish to be understood as confining myself to thespecificgdetails of mere mechanical construction and correlatlon of theelements of my improvements as herein shown and described, as under thespirit of my invention and the scope of the appended claims, ll believe'that I am entitled to the employment of slight varlations of mere.mechanical detail.

Having thus described my invention, what l claiml as new and desire tosecure by LettersV Patent, is:

1. In a device of the character described, a fan comprisin a hub havingSlots in the rear face thereo radially extending blades havingrespectively a shank turnably jour'- naled through said hub and arearwardly extending p1n for extension through said slots, said hubhaving a rearwardly extending sleeve, anda pulley mounted on saidsleeve, and a collar turnably mounted on said' sleeve, and means forlimiting the turnable movement in relation to said sleeve, said collarhaving a peripherally recessed fiange for engaging said pins, and areciprocative element tor operatin said collar, and means for actuatingsaid e ement,

2. ln a device of the character described, a fan comprisinv 'a hubhaving slots in the rear face thereo radially extendino' blades havingrespectively a sha-nk turnab y journaled through said hub and arearwardly extending pm for extension through said slots, said hubhaving arearwardly extending sleeve, and a pulle mounted on sai'dsleeve, and a collar turnay l mounted on said sleeve, and means forlimiting the turnable movement thereof in relation to said sleeve, saidcollar having a pcripherally recessed flange for engaging said pins, anda reciprocative sleeve-element slidable on said collar and having meansfor rotating said colla-r to a limited degree, and means for actuatingsaid sleeve-element comprising an oscillatory forked rod and a draw bar.

Si ned at Sheyenne in the county of Eddy and tate of North Dakota this8th day of June A. D. 1921.

RUDOLPH KRAMER.

